Influence of Substrate Bias Voltage on Corrosion and Wear Behavior of Physical Vapor Deposition CrN Coatings

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TitreInfluence of Substrate Bias Voltage on Corrosion and Wear Behavior of Physical Vapor Deposition CrN Coatings
Type de publicationJournal Article
Year of Publication2019
AuteursAouadi K, Tlili B, Nouveau C, Besnard A, Chafra M, Souli R
JournalJOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
Volume28
Pagination2881-2891
Date PublishedMAY
Type of ArticleReview
ISSN1059-9495
Mots-cléscorrosion, CrN coatings, substrate bias voltage, tribology, wear
Résumé

The objective of the present paper is to study the influence of the substrate bias voltage on the microstructure, composition, deposition rate, tribological and corrosion properties of CrN coatings obtained by DC magnetron sputtering on 90CrMoV8 steel and Si (100) substrates. The substrate bias voltage varied from 0 to - 700V. The deposited films were characterized by SEM, XRD and potentiodynamic polarization. The wear behavior and coefficient of friction were determined and investigated after rotative tribometer tests. The results indicated that the substrate bias voltage considerably affected the intrinsic properties of the CrN films. Indeed, it significantly influenced the grain size and the root-mean-squared roughness which varied from 20 to 29nm, and from 9 to 19nm, respectively, when polarization changed from 0 to - 700V. All the CrN coatings have a dense columnar structure and are well crystallized according to the XRD analyses. Nevertheless, it has been shown that the peaks intensity decreased by increasing the substrate bias voltage. By applying a substrate bias voltage, it was obvious that the friction behavior was enhanced, and the wear volume was decreased. Finally, the CrN coating obtained under a substrate bias voltage of - 500V presented the best corrosion resistance and wear resistance probably due to its dense microstructure.

DOI10.1007/s11665-019-04033-y